Re: XPath expression for checking that an xs:duration

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Subject: Re: XPath expression for checking that an xs:duration value is not negative?
From: Michael Kay <mike@xxxxxxxxxxxx>
Date: Sat, 23 Apr 2011 18:31:42 +0100

On 23/04/2011 18:11, David Carlisle wrote:

On 23/04/2011 15:49, Brandon Ibach wrote:
 wouldn't it be sufficient to just
check for the leading minus sign?
yes thought about that afterwords, although hadn't checked if multiple - were allowed. You might need to remove white space first eg with normalize-space)

I think checking for a leading "-" sign (after removing leading whitespace) should do the job. But it's safest to cast explicitly to a string first, since we aren't told whether the <duration> element is typed or untyped.

Michael Kay
Saxonica

Current Thread
XPath expression for checking that an xs:duration value is not negative? Costello, Roger L. - 23 Apr 2011 13:22:22 -0000 David Carlisle - 23 Apr 2011 14:41:40 -0000 Brandon Ibach - 23 Apr 2011 14:49:38 -0000 David Carlisle - 23 Apr 2011 17:12:08 -0000 Michael Kay - 23 Apr 2011 17:31:54 -0000 <=

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